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Define access time. Access time is the time from when a read or write request is issued to when data transfer starts.
Define reference file
Section A: Use the following tables to create a database called College. Use SQL commands. Student stuid(primary) lastName firstName
what is query processing?
Self-Join: In a self join a table is joined with itself. Let consider the following sample partial data of EMP table EMPNO ENAME MGRID
Explain Instance and schemas? Instances and schemas: Databases changes over time as the information is deleted and inserted. The collection of information stored in database
Consider the following relational schema: PERSON (SS#, NAME, ADDRESS) CAR (REGISTRATION_NUMBER, YEAR, MODEL) ACCIDENT (DATE, DRIVER, CAR_REG_NO) OWNS (SS#, LICENSE) Constru
Define object-relational systems? Systems that give object-oriented extensions to relational systems are known as object-relational systems.
What is transaction? Transaction is a unit of program implementation that accesses and possibly updated several data items.
Which is a legal expression in SQL? SELECT NAME FROM EMPLOYEE is a legal expression in SQL.
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